The short answer is about 10,000 cycles, which for most households works out to somewhere between five and nine years. But the useful answer is in why springs are measured that way at all, because it explains the thing that frustrates everyone: a spring that worked perfectly yesterday is in two pieces this morning.
A cycle is one open and one close
Spring manufacturers rate their product in cycles because that is what actually wears it. Time on the wall does almost nothing; winding and unwinding under load does everything. A standard residential torsion spring is built for roughly 10,000 cycles.
Do the arithmetic on your own household:
- Two cycles a day — one car, out in the morning, back at night — gets you about 13 years.
- Four cycles a day — two drivers, or one driver who comes home for lunch — gets you about 7 years.
- Six to eight cycles a day — two working adults, a teenager, and a garage that functions as the main entrance to the house — gets you 3 to 4 years.
That last case describes an enormous number of homes around here, where the garage door is the door everyone actually uses and the front door is decorative. If your springs seem to fail more often than your neighbour's, count how many times the door moves in a day. That is usually the whole explanation.
Why it fails all at once
Steel under repeated stress does not degrade gracefully. Microscopic cracks form at the surface, propagate inward over thousands of cycles, and then the remaining cross-section fails instantly. There is no soft landing, no gradual weakening you would notice while lifting the door, no warning noise on the last cycle.
This is why "it was fine yesterday" is true and also irrelevant. The spring had been failing invisibly for months.
Cold weather is the trigger, not the cause
Our busiest weeks are the first hard freezes of January and February, and there is a reason for that beyond bad luck. Cold steel is less ductile — the same flaw that would have survived another few hundred cycles in July gives way at minus ten. The grease in the bearings thickens, so the whole system takes more force to move. And the door itself can freeze to the concrete at the bottom seal, at which point the opener tries to lift a door that is stuck fast and the spring takes the shock.
None of that means the cold broke your spring. The cold picked the day; the previous seven years did the work.
Warning signs, when there are any
Metal fatigue itself is invisible, but plenty of springs give away their age in other ways:
- The door feels heavier by hand than it used to when you disconnect the opener.
- The door will not stay put when you stop it halfway with the opener disconnected — it drops or creeps upward. This is the balance test, and failing it means the spring tension is no longer correct.
- The opener strains, hesitates, or runs hot on the way up.
- Visible gaps, rust, or stretched-looking coils on the spring above the door.
- The door comes down faster than it used to and lands hard instead of settling.
The balance test takes thirty seconds and is worth doing twice a year. Pull the red release cord, lift the door to about waist height by hand, and let go. A correctly balanced door stays roughly where you left it.
Should you replace both springs?
On a double door with two torsion springs, yes. Both were installed the same day and have taken exactly the same number of cycles, so the intact one is not a spare — it is the next failure, usually within months. Replacing the pair while the tension is already released costs considerably less than paying a second service call, and it keeps the door balanced in the meantime.
High-cycle springs are usually worth it
Springs rated for 20,000 or 30,000 cycles cost more up front, and the premium is modest relative to the labour of getting to them. On a door that opens six or eight times a day, doubling the cycle rating roughly doubles the service life, which means one fewer service call in the next decade.
They are also physically larger — longer, with heavier wire — so headroom has to allow for them. On most doors it does.
What not to do
Do not attempt this yourself. A wound torsion spring stores several hundred pounds of energy on a shaft directly above head height, and it is released in measured quarter-turns with winding bars. A bar that slips becomes a projectile. Emergency departments see these injuries every year and they are severe.
There is also a sizing problem you cannot solve at a hardware store. A torsion spring is specified by wire diameter, inside diameter, length and wind direction, and a spring that is close but not right will either fail early or leave the door unbalanced — which then destroys the opener you were trying to protect.
While the spring is being replaced
It is worth having the cables looked at in the same visit. They run from the bottom brackets to the drums on the same shaft, they corrode from the bottom up thanks to road salt, and a spring failure often takes one with it. The labour overlaps almost completely, so it is the cheapest time to deal with them.
Springs are the most common garage door failure we see across Westmont, Downers Grove, Darien and the surrounding towns — mostly because so much of the housing here dates from the 1970s and is still on original or first-replacement equipment. If your door is not behaving, tell us what it is doing and we can usually diagnose it over the phone.